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Search Petrowiki: Fluid flow in naturally fractured reservoirs
...Fluid flow in ...naturally fractured reservoirs This article focuses on interpretation of well test data from wells completed in ...naturally fractured reservoirs. Because of the presence of two distinct types of porous media, the assumption of homogeneous behav...
This article focuses on interpretation of well test data from wells completed in naturally fractured reservoirs. Because of the presence of two distinct types of porous media, the assumption of homogeneous behavior is no longer valid in naturally fractured reservoirs. This article discusses two naturally fractured reservoir models, the physics governing fluid flow in these reservoirs and semilog andtype curve analysis techniques for well tests in these reservoirs. Naturally fractured reservoirs are characterized by the presence of two distinct types of porous media: matrix and fracture. Because of the different fluid storage and conductivity characteristics of the matrix and fractures, these reservoirs often are called dual-porosity reservoirs.Figure 1 illustrates a naturally fractured reservoir composed of a rock matrix surrounded by an irregular system of vugs and natural fractures. Fortunately, it has been observed that a real, heterogeneous, naturally fractured reservoir has a characteristic behavior that can be interpreted using an equivalent, homogeneous dual-porosity model such as that shown in the idealized sketch.
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...Recognizing naturally fractured reservoirs Fractures are the most abundant visible structural features in the Earth's upper crust. They are ...apparent at most rock ridges, and it is likely that most reservoirs contain some natural fractures. ...Naturally fractured reservoirs are elusive systems to characterize and difficult to engineer and predict. It is important to estab...
Fractures are the most abundant visible structural features in the Earth's upper crust. They are apparent at most rock ridges, and it is likely that most reservoirs contain some natural fractures. Naturally fractured reservoirs are elusive systems to characterize and difficult to engineer and predict. It is important to establish some basic criteria for recognizing when fractures are an important element in reservoir performance and to recognize the nature and performance characteristics of a naturally fractured reservoir. Unlike induced fractures, natural fractures are caused by stress in the formation usually from tectonic forces such as folds and faults.
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...tures in the Earth's upper crust. They are apparent at most rock ridges, and it is likely that most reservoirs contain some natural fractures. ...Naturally fractured reservoirs are elusive systems to characterize and difficult to engineer and predict. It is important to estab...t element in reservoir performance and to recognize the nature and performance characteristics of a naturally fractured reservoir. Unlike induced fractures, natural fractures are caused by stress in the formation usual...
Fractures are the most abundant visible structural features in the Earth's upper crust. They are apparent at most rock ridges, and it is likely that most reservoirs contain some natural fractures. Naturally fractured reservoirs are elusive systems to characterize and difficult to engineer and predict. It is important to establish some basic criteria for recognizing when fractures are an important element in reservoir performance and to recognize the nature and performance characteristics of a naturally fractured reservoir. Unlike induced fractures, natural fractures are caused by stress in the formation usually from tectonic forces such as folds and faults.
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...Category:5.8.6 Naturally fractured reservoir . Pages in category "5.8.6 ...Naturally fractured reservoir" The following 2 pages are in this category, out of 2 total. F * ...Fluid flow in ...
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...Fluid flow with formation damage Formation damage caused by drilling-...fluid invasion, production, or injection can lead to positive skin factors and affect ...fluid flow by reducing permeability. Contents * 1 Permeability reduction and formation damage * 2 Altered ...
Formation damage caused by drilling-fluid invasion, production, or injection can lead to positive skin factors and affect fluid flow by reducing permeability. When mud filtrate invades the formation surrounding a borehole, it will generally remain in the formation even after the well is cased and perforated. This mud filtrate in the formation reduces the effective permeability to hydrocarbons near the wellbore. It may also cause clays in the formation to swell, reducing the absolute permeability of the formation. In addition, solid particles from the mud may enter the formation and reduce permeability at the formation face.
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...Fluid flow through permeable media This article discusses the basic concepts of single-component or constant...-composition, single phase fluid flow in homogeneous petroleum ...reservoirs, which include ...
This article discusses the basic concepts of single-component or constant-composition, single phase fluid flow in homogeneous petroleum reservoirs, which include flow equations for unsteady-state, pseudosteady-state, and steady-state flow of fluids. Various flow geometries are treated, including radial, linear, and spherical flow. Virtually no important applications of fluid flow in permeable media involve single component, single phase 1D, radial or spherical flow in homogeneous systems (multiple phases are almost always involved, which also leads to multidimensional requirements). The applications given in this Chapter are based on a model that includes many simplifying assumptions about the well and reservoir, and are interesting mainly only from a historical perspective See "Reservoir Simulation" for proper treatment of multi-component, multiphase, multidimensional flow in heterogeneous porous media. The simplifying assumptions are introduced here as needed to combine the law of conservation of mass, Darcy's law, and equations of state to obtain closed-form solutions for simple cases. Consider radial flow toward a well in a circular reservoir. Combining the law of conservation of mass and Darcy's law for the isothermal flow of fluids of small and constant compressibility yields the radial diffusivity equation,[1] In the derivation of this equation, it is assumed that compressibility of the total system,ct, is small and independent of pressure; permeability, k, is constant and isotropic; viscosity,μ, is independent of pressure; porosity, ϕ, is constant; and that certain terms in the basic differential equation (involving pressure gradients squared) are negligible.
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... and tubing * Casing collar locator * Casing drilling * Casing inspection logs * Casing-annulus-flow installation design * CBM basin assessment * CBM case studies * CBM economics * CBM production ...iled tubing fatigue * Cold heavy oil production with sand * Combination completions * Completion flow control accessories * Conducting the acidizing procedure * Contact time in cementing * Controlli...cipitates due to acidizing * Converting geothermal to electric power * Core analyses in tight gas reservoirs * Coriolis gas flowmeters * Cuttings analysis during mud logging * Cuttings transport * Cyber s...
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...PEH:Fluid Flow Through Permeable Media Publication Information Petroleum Engineering Handbook Larry W. Lake...physics Edward D. Holstein, Editor Copyright 2007, Society of Petroleum Engineers Chapter 8 – Fluid Flow Through Permeable Media John Lee, Texas A&M U. Pgs. 719-894 ISBN 978-1-55563-120-8 Get permis...sion for reuse This chapter discusses fluid flow in petroleum ...
Many important applications of fluid flow in permeable media involve 1D, radial flow. These applications are based on a model that includes many simplifying assumptions about the well and reservoir. These assumptions are introduced as needed to combine the law of conservation of mass, Darcy's law, and equations of state to achieve our objectives. Consider radial flow toward a well in a circular reservoir. Combining the law of conservation of mass and Darcy's law for the isothermal flow of fluids of small and constant compressibility yields the radial diffusivity equation,[1]
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...PEH:Mathematics of Fluid Flow Publication Information Petroleum Engineering Handbook Larry W. Lake, Editor-in-Chief Volu...ohn R. Fanchi, Editor Copyright 2007, Society of Petroleum Engineers Chapter 2 – Mathematics of Fluid Flow John R. Fanchi, Colorado School of Mines Pgs. 45-76 ISBN 978-1-55563-108-6 Get permission for... reuse The purpose of this chapter is to review the mathematics of fluid flow. We limit our review to essential aspects of partial differential equations, vector analysis, numer...
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...Type curves Type curves provide a powerful method for analyzing pressure drawdown (flow) and buildup tests. Fundamentally, type curves are preplotted solutions to theflow equations, such ...imensionless variables. To review dimensionless variables, consider theEi- function solution to the flow equation,Eq. 1, presented in terms of dimensional variables: ...(1) Eq. 1 can be...ns indicate that the type curve was developed specifically for drawdown tests in undersaturated oil reservoirs. The type curve is also useful to analyze pressure buildup tests and for gas wells. In the Gringar...
Type curves provide a powerful method for analyzing pressure drawdown (flow) and buildup tests. Fundamentally, type curves are preplotted solutions to theflow equations, such as the diffusivity equation, for selected types of formations and selected initial and boundary conditions. Because of the way they are plotted (usually on logarithmic coordinates), it is convenient to compare actual field data plotted on the same coordinates to the type curves. The results of this comparison frequently include qualitative and quantitative descriptions of the formation and completion properties of the tested well. The solutions plotted on type curves are usually presented in terms of dimensionless variables.
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